AeroMACS: Understanding the Aeronautical Mobile Airport Communications System

This page explains the basics of the AeroMACS system (Aeronautical Mobile Airport Communications System) and highlights its benefits and advantages.

Advances in telecommunication technologies are crucial for improving Air Traffic Management (ATM), reducing flight delays, alleviating airport congestion, and enhancing air safety and security. This necessitates improved communication links between aircraft and ground systems, which AeroMACS is designed to address.

What is AeroMACS?

• AeroMACS is a wireless broadband technology developed based on the IEEE 802.16e standard by the WiMAX Forum. The latest revision to the WiMAX standard is IEEE 802.16-2009.
• It operates in the protected and licensed frequency band of 5091 to 5150 MHz, as designated by the ITU at WRC.
• It supports channels with 5 MHz bandwidth, uses OFDMA modulation with complex modulation schemes (QPSK, 16-QAM, 64-QAM), and employs TDD duplexing.
• It supports an average data rate of about 5 to 10 Mbps and a coverage distance of approximately 5 km.
• It facilitates both fixed and mobile ground communications between aircraft and the air traffic control unit.
• When an aircraft is in the sky, communication between the aircraft and ground systems relies on existing VDL (VHF digital link) and future L-band satellite systems like LDACS.
• Upon landing, the aircraft establishes a connection with the AeroMACS network to exchange data with ground systems and utilize various ATM applications.
• The AeroMACS ecosystem comprises aviation authorities, airports, air carriers, network operators, equipment vendors, and service providers.

Figure 1 illustrates the various applications of the AeroMACS system.

Benefits and Advantages of AeroMACS

The following are the key benefits and advantages of the AeroMACS system:

• Improved Ground-to-Aircraft Communication: AeroMACS provides increased capacity and higher bandwidth compared to traditional wireline and existing wireless networks.
• Real-time Video Connectivity: Enables real-time support from medical personnel in emergency situations, providing crucial first aid guidance before the aircraft reaches the gate where full resources are available.
• Versatile Application Support: AeroMACS supports data, voice, and video applications, catering to diverse communication needs.
• Cost-Effective Deployment: Lower installation and maintenance costs compared to other expensive communication systems.
• Enhanced Security and Privacy: Supports AAA (e.g., PKMv2, EAP), encryption, digital certificates (e.g., ITU.T X.509, AES), and VPN protocols, ensuring secure and private communications.